Author : Akash R. Modi 1
Date of Publication :25th January 2018
Abstract: Corrosion of steel rebar in exposed reinforced concrete (RC) structures located in the marine environment is one of the major problems in the construction industry. Corrosion can be described as the deterioration of a metal that results from an electrochemical or chemical reaction to its surrounding environment. The magnitude of reinforcement corrosion has a significant effect on flexural strength, deformational behavior, ductility, bond strength and mode of failure of the reinforced-concrete structures. Hence, from past two decades, researchers have developed various techniques which can be used for controlling corrosion of RC structures. Due to the cost associated with conventional techniques and some environmental issues related to them, the researchers started developing new cost-effective, environmentally friendly corrosion controlling technique. Corrosion effect can be minimized by providing proper cover or plastering with cement mortar, so that percolation of atmospheric agents can be minimized. Hence the use of corrosion inhibitors is motivated in the construction industry. The present paper reviews various types of admixtures which can be effectively used as the corrosion inhibitor for corrosion control of steel reinforced in concrete. The paper majorly focuses on the use of green materials such as coconut shell ash (CSA), tamarinds pulp husk extract (TPHE) as a corrosion inhibitor in concrete.
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